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Finding the Fourth Proportional to 129,674.39, 194,511.78 and 85,498.47

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Solution

The fourth proportional to 129,674.39, 194,511.78 and 85,498.47 is: 128,247.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,674.39 : 194,511.78 = 85,498.47 : x
  2. Step 2: Convert to fraction form
    129,674.39/194,511.78 = 85,498.47/x
  3. Step 3: Cross multiply
    129,674.39x = 194,511.78 × 85,498.47
  4. Step 4: Simplify right side
    129,674.39x = 16,630,459,586.98
  5. Step 5: Solve for x
    x = 16,630,459,586.98/129,674.39
  6. Step 6: Final answer
    x = 128,247.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.